According to Newton's law of cooling, the heat energy lost per unit area of a body depends on the

I. Surface area

II. Nature of the surface

III. Temperature of the surface

IV. Excess temperature over the surroundings

davidenyenihi

1 year ago

The correct answer is D. I, II and IV.

Explanation:
Newton's law of cooling states that the rate of heat loss of a body is directly proportional to the excess temperature of the body over the surroundings and also depends on the nature of the surface and the surface area of the body. Therefore, the heat energy lost per unit area of a body depends on:

Surface area (I)
Nature of the surface (II)
Excess temperature over the surroundings (IV)
The temperature of the surface (III) is not directly mentioned in Newton's law of cooling as a factor; instead, it's the excess temperature over the surroundings that plays a key role.